Why do my Huandai accent 1.6 2009 stall at a stop

When an engine stalls at stops, it's having low speed problems. Could be caused by Faulty oxygen or mass airflow sensor, clogged EGR valve, bad spark plugs. idle air control valve problem, fuel delivery system problems. and even a malfunctioning transmission..... These things aren't difficult to diagnose. You could go to a car parts store and get codes read free, or if you don't know how to work on modern cars, just go to a mechanic for the fix.

This old could be any number of things, the best option is find a good independent shop and get a live data scan done, the Tech can then see what is actually going on with the sensors and the computers response to those readings and can also see if any sensors are showing misreads then make recommendations on repairs.